CVE-2022-28368: Dompdf/dompdf Remote Code Injection Vulnerability

CRITICAL
Advisory Identifier: GHSA-x752-qjv4-c4hc
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CVSS 9.8
CWE-79
Published
Advisory Summary

CVE-2022-28368 is a CRITICAL (CVSS 9.8) remote code injection vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Dompdf/dompdf libraries in the Packagist ecosystem. The issue involves remote code injection in dompdf/dompdf. Remediation is available by upgrading affected packages to version 1.2.1.

CVE-2022-28368 at a Glance

CVE Identifier CVE-2022-28368
GHSA Identifier GHSA-x752-qjv4-c4hc
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Dompdf/dompdf
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 9.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2022-28368

To remediate this vulnerability, upgrade all affected Dompdf/dompdf dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

dompdf/dompdf fixed: 1.2.1 
Upgrade dompdf/dompdf to 1.2.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for dompdf/dompdf

How to Check if You Are Affected

To determine whether your application is affected by CVE-2022-28368, inspect your project dependencies for Dompdf/dompdf:

inspect dependencies for dompdf/dompdf

Analyze the terminal output to locate any version of Dompdf/dompdf in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.2.1), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Dompdf/dompdf, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Dompdf is an HTML to PDF converter. Dompdf before 1.2.1 allows remote code execution via a .php file in the src:url field of an @font-face Cascading Style Sheets (CSS) statement (within an HTML input file).

CVE-2022-28368 Affected Dompdf/dompdf Versions

1 component(s)
Fixed Versions:
1.2.1
Product / Package Ecosystem Affected Versions Fixed Version
dompdf/dompdf
 Packagist
< 1.2.1
1.2.1

References

NVD — CVE-2022-28368 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-28368
Dompdf/dompdf Source Repository REPOSITORY
https://github.com/dompdf/dompdf/issues/2598
Dompdf/dompdf Source Repository REPOSITORY
https://github.com/dompdf/dompdf/pull/2808
Security Fix Commit FIX COMMIT
https://github.com/dompdf/dompdf/commit/4c70e1025bcd9b7694b95dd552499bd83cd6141d
Dompdf/dompdf Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/dompdf/dompdf/CVE-2022-28368.yaml
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-x752-qjv4-c4hc
Dompdf/dompdf Source Repository REPOSITORY
https://github.com/dompdf/dompdf
Dompdf/dompdf Source Repository REPOSITORY
https://github.com/snyk-labs/php-goof
packagist.org/packages/dompdf/dom... WEB
https://packagist.org/packages/dompdf/dompdf#v1.2.1
Dompdf/dompdf Security Information SECURITY
https://snyk.io/blog/security-alert-php-pdf-library-dompdf-rce
Dompdf/dompdf Security Information SECURITY
http://packetstormsecurity.com/files/171738/Dompdf-1.2.1-Remote-Code-Execution.html

Frequently Asked Questions

What is CVE-2022-28368?
CVE-2022-28368 is a security vulnerability in Dompdf/dompdf involving Remote code injection in dompdf/dompdf under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Dompdf/dompdf versions are affected?
Affected versions include releases prior to 1.2.1 across affected packages: dompdf/dompdf.
What version fixes CVE-2022-28368?
Upgrading to 1.2.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is dompdf/dompdf affected?
Yes, dompdf/dompdf is affected in releases prior to 1.2.1. Upgrade your dependency to 1.2.1 or later.
What is the CVSS score of CVE-2022-28368?
CVE-2022-28368 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2022-28368?
CVE-2022-28368 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check Packagist dependencies for CVE-2022-28368?
Run the dependency tree command: 'inspect dependencies for dompdf/dompdf'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-x752-qjv4-c4hc",
  "modified" : "2022-04-15T16:49:27Z",
  "published" : "2022-04-04T00:00:55Z",
  "aliases" : [ "CVE-2022-28368" ],
  "summary" : "Remote code injection in dompdf/dompdf",
  "details" : "Dompdf is an HTML to PDF converter. Dompdf before 1.2.1 allows remote code execution via a .php file in the src:url field of an @font-face Cascading Style Sheets (CSS) statement (within an HTML input file).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "dompdf/dompdf"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.2.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-28368"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/dompdf/dompdf/issues/2598"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/dompdf/dompdf/pull/2808"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/dompdf/dompdf/commit/4c70e1025bcd9b7694b95dd552499bd83cd6141d"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/dompdf/dompdf/CVE-2022-28368.yaml"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-x752-qjv4-c4hc"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/dompdf/dompdf"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/snyk-labs/php-goof"
  }, {
    "type" : "WEB",
    "url" : "https://packagist.org/packages/dompdf/dompdf#v1.2.1"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/blog/security-alert-php-pdf-library-dompdf-rce"
  }, {
    "type" : "WEB",
    "url" : "http://packetstormsecurity.com/files/171738/Dompdf-1.2.1-Remote-Code-Execution.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-04-05T18:00:16Z",
    "nvd_published_at" : "2022-04-03T03:15:00Z"
  }
}